I don't have a lot of data points, but for the one PHP developer I had learn haskell by writing a webapp in it, 6 months from "never seen haskell before" to "feels comfortable working solo and doesn't need help". The first 80% comes pretty quick, but not needing someone to answer questions takes a while.
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I don't have a lot of data points, but for the one PHP developer I had learn haskell by writing a webapp in it, 6 months from "never seen haskell before" to "feels comfortable working solo and doesn't need help". The first 80% comes pretty quick, but not needing someone to answer questions takes a while.
This is helped by the fantastic haskell community. The IRC channels are great.